Motion In Combined Electric And Magnetic Fields
Chapter Name : Moving Charges And Magnetism |
Sub Topic Code : 101_12_04_04_01 |
Topic Name : Motion In Combined Electric And Magnetic Fields |
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Sub Topic Name : Velocity Selector |
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Introduction
We can select the velocity of any particle in magnetic field so that it remains unaffected by field.
Pre-Requisites:
Knowledge about movement of charge particle in electric and magnetic field.
Activity:
Find the effect of E and B on the charge particle in any mass spectrometer.
Real Life Question:
On what principle Mass Spectrometer is based on?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Crossed Fields | When Electric Field and magnetic field are perpendicular to each other. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Mass spectrometer | We can find charge to mass ratio of any particle using this instrument. |
Real life uses :
To find the charge to mass ratio of any charge particle.
Places to visit :
Your school physics lab to see the mass spectrometer.
Practical examples around us
| Examples | Explainations |
|---|---|
| Mass spectrometer | We can preset the value of velocity in this instrument. |
What you learn in Theory:
In the crossed fields, we can define velocity of any particle as v = E/B.
What you learn in Practice:
To make a velocity selector we have to use perpendicular fields, this phenomenon can be used to find out the charge to mass ratio of any particle.